events: port some wpt tests

Add WPT AddEventListenerOptions-once test. PR-URL: #34169 Reviewed-By: Benjamin Gruenbaum <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Denys Otrishko <[email protected]>

Author: Ethan-Arrowood

test/parallel/test-eventtarget-whatwg-customevent.js

@@ -0,0 +1,33 @@
+'use strict';
+
+constcommon=require('../common');
+
+const{ strictEqual, throws, equal }=require('assert');
+
+// Manually converted from https://github.com/web-platform-tests/wpt/blob/master/dom/events/CustomEvent.html
+// in order to define the `document` ourselves
+
+{
+consttype='foo';
+consttarget=newEventTarget();
+
+target.addEventListener(type,common.mustCall((evt)=>{
+strictEqual(evt.type,type);
+}));
+
+target.dispatchEvent(newEvent(type));
+}
+
+{
+throws(()=>{
+newEvent();
+},TypeError);
+}
+
+{
+constevent=newEvent('foo');
+equal(event.type,'foo');
+equal(event.bubbles,false);
+equal(event.cancelable,false);
+equal(event.detail,null);
+}

test/parallel/test-eventtarget-whatwg-once.js

@@ -83,3 +83,50 @@ const{
 document.dispatchEvent(newEvent('test'));
 strictEqual(invoked_count,2,'Once handler should only be invoked once');
 }
+
+// Manually converted from https://github.com/web-platform-tests/wpt/blob/master/dom/events/AddEventListenerOptions-once.html
+// in order to define the `document` ourselves
+
+{
+constdocument=newEventTarget();
+
+// Should only fire for first event
+document.addEventListener('test',common.mustCall(1),{once: true});
+// Should fire for both events
+document.addEventListener('test',common.mustCall(2));
+// Fire events
+document.dispatchEvent(newEvent('test'));
+document.dispatchEvent(newEvent('test'));
+}
+{
+constdocument=newEventTarget();
+
+consthandler=common.mustCall(2);
+// Both should only fire on first event
+document.addEventListener('test',handler.bind(),{once: true});
+document.addEventListener('test',handler.bind(),{once: true});
+// Fire events
+document.dispatchEvent(newEvent('test'));
+document.dispatchEvent(newEvent('test'));
+}
+{
+constdocument=newEventTarget();
+
+consthandler=common.mustCall(2);
+
+// Should only fire once on first event
+document.addEventListener('test',common.mustCall(1),{once: true});
+// Should fire twice until removed
+document.addEventListener('test',handler);
+// Fire two events
+document.dispatchEvent(newEvent('test'));
+document.dispatchEvent(newEvent('test'));
+
+// Should only fire once on the next event
+document.addEventListener('test',common.mustCall(1),{once: true});
+// The previous handler should no longer fire
+document.removeEventListener('test',handler);
+
+// Fire final event triggering
+document.dispatchEvent(newEvent('test'));
+}

test/parallel/test-eventtarget-whatwg-passive.js

@@ -2,13 +2,15 @@
 
 constcommon=require('../common');
 
+// Manually converted from https://github.com/web-platform-tests/wpt/blob/master/dom/events/AddEventListenerOptions-passive.html
+// in order to define the `document` ourselves
+
 const{
  fail,
  ok,
  strictEqual
 }=require('assert');
 
-// Manually ported from WPT AddEventListenerOptions-passive.html
 {
 constdocument=newEventTarget();
 letsupportsPassive=false;